Curtis M Scott

US Patent:

58552553, Jan 5, 1999

Filed:

Mar 27, 1997

Appl. No.:

8/826460

Inventors:

Gustavus Pearl Bock - Bellbook OH
Curtis Albert Scott - Beavercreek OH

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B60T 1374

US Classification:

188162

Abstract:

An electric drum brake comprising: an electric motor including an armature for providing actuation force for the electric drum brake and a backing plate comprising a substantially flat disk portion, a support section located radially outward from a center of the flat disk portion and a substantially cylindrical wall projecting out of the support section as a continuous structure thereof, wherein an armature for the electric motor is located substantially within the substantially cylindrical wall.

US Patent:

57851573, Jul 28, 1998

Filed:

Mar 27, 1997

Appl. No.:

8/828011

Inventors:

Curtis Albert Scott - Beavercreek OH
William Frank Borchers - Beavercreek OH
Gustavus Pearl Bock - Bellbook OH

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F16D 6527

US Classification:

188156

Abstract:

A park brake apparatus for a vehicle electric brake comprises an electric motor having a rotational output shaft coupled to a brake mechanism. Rotational movement of the electric motor in a first direction causes application of brake force in the brake mechanism and rotational movement of the electric motor in a second direction opposite the first direction causes release of brake force in the brake mechanism. An armature for the electric motor includes a plurality of radially extending armature arms. A solenoid has a plunger movable between extended and retracted positions. In the retracted position, the plunger is free of the radially extending armature arms and the armature spins free of the plunger. In the extended position, the plunger engages the radially extending armature arms, locking the armature in place and maintaining a park brake state.